We known for a while that Comcast's "unlimited" broadband is actually not so. The monthly usage limit seemed to be near 300GB before, but reader Ace says that he got a nasty phone call warning him that his usage is in the top one percent of residential plans, and it's pissing on everyone else's internet funtime (unless he gets the more expensive business plan, natch)-yet he says his usage is only about 150-200GB a month.